atomic_exchange.pass.cpp revision cedb7fcc10556aaf4302917913c672b1bc6a1db0 
1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This test uses new symbols that were not defined in the libc++ shipped on
11// darwin11 and darwin12:
12// XFAIL: with_system_lib=x86_64-apple-darwin11
13// XFAIL: with_system_lib=x86_64-apple-darwin12
14
15// <memory>
16
17// shared_ptr
18
19// template <class T>
20// shared_ptr<T>
21// atomic_exchange(shared_ptr<T>* p, shared_ptr<T> r)
22
23#include <memory>
24#include <cassert>
25
26int main()
27{
28#if __has_feature(cxx_atomic)
29    {
30        std::shared_ptr<int> p(new int(4));
31        std::shared_ptr<int> r(new int(3));
32        r = std::atomic_exchange(&p, r);
33        assert(*p == 3);
34        assert(*r == 4);
35    }
36#endif
37}
38